EP0032854A1 - Verfahren zur Gewinnung eines kristallinen Silikoaluminates vom Typ A mit hoher Wasserwiederaufnahme, insbesondere vom Typ 4A, und so erhaltenes Produkt - Google Patents

Verfahren zur Gewinnung eines kristallinen Silikoaluminates vom Typ A mit hoher Wasserwiederaufnahme, insbesondere vom Typ 4A, und so erhaltenes Produkt Download PDF

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Publication number
EP0032854A1
EP0032854A1 EP81400018A EP81400018A EP0032854A1 EP 0032854 A1 EP0032854 A1 EP 0032854A1 EP 81400018 A EP81400018 A EP 81400018A EP 81400018 A EP81400018 A EP 81400018A EP 0032854 A1 EP0032854 A1 EP 0032854A1
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EP
European Patent Office
Prior art keywords
temperature
medium
solution
aluminate
molar ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81400018A
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English (en)
French (fr)
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EP0032854B1 (de
Inventor
Bertrand Latourrette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enichem Augusta Industriale SRL
Rhone Poulenc Commerciale SpA
Original Assignee
Rhone Poulenc Chimie SA
Rhone Poulenc Chimie de Base SA
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Publication date
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Application filed by Rhone Poulenc Chimie SA, Rhone Poulenc Chimie de Base SA filed Critical Rhone Poulenc Chimie SA
Priority to AT81400018T priority Critical patent/ATE4695T1/de
Publication of EP0032854A1 publication Critical patent/EP0032854A1/de
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
    • C01B33/28—Base exchange silicates, e.g. zeolites
    • C01B33/2807—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures
    • C01B33/2815—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L)
    • C01B33/2823—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L) from aqueous solutions of an alkali metal aluminate and an alkali metal silicate excluding any other source of alumina or silica

Definitions

  • the present invention relates to a new process for obtaining a silico-aluminate with high water uptake with a SiO 2 / Al 2 O 3 molar ratio greater than 1.85 which can easily be used, as well as product obtained.
  • the production process described optionally consists in bringing a mixture of silicate and aluminate to a temperature close to the boiling temperature while maintaining a high temperature with stirring for a time sufficient to obtain type A crystals.
  • the process of the invention consists first of all in producing a homogeneous medium of the silicate and aluminate solutions before formation of the gel, then in gelling the medium, finally in making it evolve until formation of crystallites, and in separating said crystallites.
  • the SiO 2 / Al 2 O 3 molar ratio in the initial reaction medium is at least equal to 1.85 and preferably equal to 2.
  • the homogeneity of the initial medium before gelation is achieved by any known means, for example by high shear. However, it is known that in particular in concentrated environments this means may be insufficient. This is why advantageously at least one of the reagent solutions is introduced at low temperature so that the initial medium is at a temperature below room temperature, as described in French application 76 39527.
  • this temperature must be determined by those skilled in the art so as to achieve a compromise between the need not to reach too high viscosities unfavorable for homogenization by mechanical means and the obligation to delay this gelation until at this homogeneity is achieved.
  • the process applies to concentrated media, that is to say containing more than 200 g / l of zeolites.
  • this time is less than 15 min.
  • the concentrations of reactants at the end of evolution in the liquid phase can be kept very low in A1 2 0 3 and Si0 2 , less than 10 g / 1 and advantageously less than 5 g / 1, while maintaining a very high zeolite concentration of the order of at least 200 g / 1, the Na 2 0 concentration being at least 70 g / 1 when the alkali metal is sodium.
  • the first zone is a transfer zone where the medium is subjected to agitation for a very short residence time of 1 to 2 seconds, while the second zone is piston advancing and corresponds to a much longer residence time.
  • a sodium aluminate solution containing 219.5 g of aluminate is dissolved in 757.3 g of a 10 g / l solution in NaOH and is cooled to -5 ° C in a tubular exchanger (1) under a flow rate of 10 1 / hour.
  • the cooled stream is continuously mixed with a stream (3) of 41 / h of a sodium silicate solution taken at 20 ° C. and titrating 26.9% of Si0 2 and 39.46% of Na 2 0 by weight , in a stirred reactor (2).
  • the homogeneous mixture feeds by means of a peristaltic pump (4) an injector (5) with capillaries of 0.5 mm of 0 continuously forming drops which fall into the part upper part of a reactor (6) filled with petroleum maintained at 85 ° C. by a circulation (7) of heated brine.
  • the density of the bath is adjusted so that the average time of fall of the drops formed by the capillaries is 3 seconds.
  • the spherical particles are gelled and accumulate at the bottom of the reactor and are gradually transformed into a fluid suspension of silico-aluminate which collects in the conical part (9) of the reactor (6).
  • This suspension is withdrawn continuously by a suction tube (8) at the rate of 14 l / hour, after one hour of continuous supply of the reagents in order to define an average residence time of reagents of 2 hours 15 minutes in the reactor .
  • the suction suspension is then wrung and washed by any known means and dried in an oven at 100 ° C.
  • the mother liquors contain 70 g / 1 of Na 2 0 - 2.6 g / 1 of Si0 2 and 3.0 g / 1 of Al 2 O 3
  • the chemical formula of the product obtained is 1.06 Na 2 O Al 2 O 3 , 2.04 SiO 2
  • the X-ray spectrum is characteristic of type 4A.
  • the particle size measured with the Coulter counter gives an average diameter of the crystallites equal to 3.6
  • the cation exchange power is 105 mg Ca / g of anhydrous product.
  • the water uptake is then determined by measuring the water absorption capacity determined as the rate of increase in weight of a sample kept in a desiccator at a given relative humidity after drying the sample for two hours. at a given temperature.
  • the mother liquors have the following composition: Na 2 0: 85 g / 1 - SiO 2 : 1.5 g / 1 - AI 2 0 3: 2.3 g / 1
  • the average diameter is 2.8 ⁇ and the particle size is as follows:
  • the average diameter of this zeolite is 2.6 ⁇ and its particle size meets the following distribution:
  • Example 3 is identical to Example 3 with regard to the reagents but instead of using the device according to Example 3, the medium is made to evolve in a 2-liter flask, with a double envelope, fitted with a stirrer in introducing the aluminate-silicate mixture cooled in the sol state into the flask at 85 ° C.
  • the crystallization time is 2h15.
  • a type 4A silico-aluminate is obtained without hydroxysodalite.
  • the crystalline silico-aluminate corresponds to the formula: 1.09 Na 2 O 3 , Al 2 O 3 , 2.0 2 SiO 2
  • the procedure is as follows. The two solutions are brought to approximately -5 ° C.
  • the silicate solution is poured slowly into the aluminate solution while maintaining rapid stirring in the medium (Ultra turax) so as to form a homogeneous solution which gels rapidly (of the order of a minute).
  • the 100% type 4A final product has a preserved Si0 2 / A1 2 0 3 molar ratio of 2.02 and after drying at 250 ° C the following water uptakes:
  • the gel is then kept for 8 h at 50 ° C. while maintaining mechanical stirring and the mixture is left to crystallize for 20 h at 100 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Catalysts (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Saccharide Compounds (AREA)
  • Silicon Compounds (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
EP81400018A 1980-01-18 1981-01-08 Verfahren zur Gewinnung eines kristallinen Silikoaluminates vom Typ A mit hoher Wasserwiederaufnahme, insbesondere vom Typ 4A, und so erhaltenes Produkt Expired EP0032854B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81400018T ATE4695T1 (de) 1980-01-18 1981-01-08 Verfahren zur gewinnung eines kristallinen silikoaluminates vom typ a mit hoher wasserwiederaufnahme, insbesondere vom typ 4a, und so erhaltenes produkt.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8001046 1980-01-18
FR8001046A FR2474014A1 (fr) 1980-01-18 1980-01-18 Nouveau procede d'obtention d'un silico-aluminate cristallin de type a, a reprise d'eau elevee, et notamment de type 4a, et produit ainsi obtenu

Publications (2)

Publication Number Publication Date
EP0032854A1 true EP0032854A1 (de) 1981-07-29
EP0032854B1 EP0032854B1 (de) 1983-09-21

Family

ID=9237631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400018A Expired EP0032854B1 (de) 1980-01-18 1981-01-08 Verfahren zur Gewinnung eines kristallinen Silikoaluminates vom Typ A mit hoher Wasserwiederaufnahme, insbesondere vom Typ 4A, und so erhaltenes Produkt

Country Status (12)

Country Link
EP (1) EP0032854B1 (de)
JP (1) JPS56140024A (de)
AT (1) ATE4695T1 (de)
BR (1) BR8100257A (de)
CA (1) CA1153749A (de)
DE (1) DE3160890D1 (de)
DK (1) DK18981A (de)
ES (1) ES498553A0 (de)
FI (1) FI810132L (de)
FR (1) FR2474014A1 (de)
NO (1) NO810143L (de)
PT (1) PT72364B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2161109B1 (es) * 1998-05-29 2002-06-16 Consejo Superior Investigacion Procedimiento optimizado para la obtencion de zeolitas a partir de lejias residuales de la industria de anodizacion y extrusion, utilizables en la formulacion de detergentes.
JP4921097B2 (ja) * 2006-09-29 2012-04-18 ダイコク電機株式会社 遊技場用台毎装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1536947A (fr) * 1967-03-01 1968-09-02 Mines Domaniales De Potasse Zéolites synthétiques et leur procédé de fabrication
US3674426A (en) * 1966-09-28 1972-07-04 Asahi Denka Kogyo Kk Process for producing crystalline zeolite a
FR2376074A1 (fr) * 1976-12-30 1978-07-28 Rhone Poulenc Ind Nouveau silico-aluminate cristallin synthetique, finement divise, mode d'obtention et application
FR2384716A2 (fr) * 1977-03-25 1978-10-20 Rhone Poulenc Ind Nouveau silico-aluminate cristallin synthetique, mode d'obtention et applications
GB2005653A (en) * 1977-10-12 1979-04-25 Pq Corp Preparing zeolites

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674426A (en) * 1966-09-28 1972-07-04 Asahi Denka Kogyo Kk Process for producing crystalline zeolite a
FR1536947A (fr) * 1967-03-01 1968-09-02 Mines Domaniales De Potasse Zéolites synthétiques et leur procédé de fabrication
FR2376074A1 (fr) * 1976-12-30 1978-07-28 Rhone Poulenc Ind Nouveau silico-aluminate cristallin synthetique, finement divise, mode d'obtention et application
FR2384716A2 (fr) * 1977-03-25 1978-10-20 Rhone Poulenc Ind Nouveau silico-aluminate cristallin synthetique, mode d'obtention et applications
GB2005653A (en) * 1977-10-12 1979-04-25 Pq Corp Preparing zeolites

Also Published As

Publication number Publication date
FR2474014B1 (de) 1981-12-11
CA1153749A (en) 1983-09-13
DK18981A (da) 1981-07-19
FI810132L (fi) 1981-07-19
EP0032854B1 (de) 1983-09-21
NO810143L (no) 1981-07-20
JPS56140024A (en) 1981-11-02
BR8100257A (pt) 1981-08-04
ATE4695T1 (de) 1983-10-15
FR2474014A1 (fr) 1981-07-24
ES8201105A1 (es) 1981-12-01
DE3160890D1 (en) 1983-10-27
ES498553A0 (es) 1981-12-01
PT72364B (fr) 1981-12-18
PT72364A (fr) 1981-02-01

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